.gestor-apuntes-container {
            margin: 20px 0;
            padding: 20px;
            background-color: #f9f9f9;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .gestor-apuntes-btn {
            padding: 10px 20px;
            margin: 10px 10px 10px 0;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: bold;
            transition: all 0.3s ease;
            color: white;
        }
        
        .gestor-apuntes-btn.exportar {
            background-color: #0073aa;
        }
        
        .gestor-apuntes-btn.exportar:hover {
            background-color: #005177;
        }
        
        .gestor-apuntes-btn.importar {
            background-color: #46b450;
        }
        
        .gestor-apuntes-btn.importar:hover {
            background-color: #389d44;
        }
        
        .gestor-apuntes-btn.eliminar {
            background-color: #dc3232;
        }
        
        .gestor-apuntes-btn.eliminar:hover {
            background-color: #b32424;
        }
        
        .gestor-apuntes-btn.loading {
            opacity: 0.7;
            cursor: wait;
        }
        
        .gestor-apuntes-import-container {
            margin: 20px 0;
            padding: 15px;
            background-color: #fff;
            border-radius: 4px;
            border: 1px solid #ddd;
        }
        
        #importar-apuntes-form {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }
        
        #importar-apuntes-form label {
            margin-right: 10px;
            font-weight: bold;
        }
        
        #importar-apuntes-form input[type="file"] {
            margin-right: 10px;
            padding: 5px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        
        .gestor-apuntes-messages {
            margin-top: 20px;
            padding: 10px;
            border-radius: 4px;
            display: none;
        }
        
        .gestor-apuntes-messages.success {
            background-color: #f0fff0;
            border: 1px solid #46b450;
            color: #2e7d32;
            display: block;
        }
        
        .gestor-apuntes-messages.error {
            background-color: #fff0f0;
            border: 1px solid #dc3232;
            color: #c62828;
            display: block;
        }
        
        .gestor-apuntes-error-list {
            max-height: 200px;
            overflow-y: auto;
            margin-top: 10px;
            padding: 10px;
            background-color: #f9f9f9;
            border-radius: 4px;
            font-size: 0.9em;
        }